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99dB의 DR를 갖는 단일-비트 4차 고성능 델타-시그마 모듈레이터 설계
최영길,노형동,변산호,남현석,노정진,Choi, Young-Kil,Roh, Hyung-Dong,Byun, San-Ho,Nam, Hyun-Seok,Roh, Jeong-Jin 대한전자공학회 2007 電子工學會論文誌-SD (Semiconductor and devices) Vol.44 No.2
본 논문에서는 높은 dynamic range(DR)를 얻을 수 있는 단일-비트 4차 델타-시그마 모듈레이터를 제시하였으며, 이를 구현하였다. 본 모듈레이터에 사용된 루프 필터의 구조는 피드백 패스와 피드포워드 패스를 혼합하여 사용한 구조이며, 스위치-커패시터(switched-capacitor) 방식으로 구현되었다. 측정 결과로는 20kHz의 기저대역(base band)에서 3.2MHz의 클록을 사용하였을 때 최대 99dB의 DR을 얻었다. 본 모듈레이터는 $0.18{\mu}m$ standard CMOS 공정으로 만들어졌다. In this paper, a fourth-order single-bit delta-sigma modulator is presented and implemented. The loop-filter is composed of both feedback and feedforward paths. Measurement results show that maximum 99dB dynamic range is achievable at a clock rate of 3.2MHz for 20kHz baseband. The proposed modulator has been fabricated in a $0.18{\mu}m$ standard CMOS process.
"라 일라하 일랄라"에 관한 연구 -부카리가 수집한 하디스를 중심으로-
최영길 ( Young Kil Choi ) 한국중동학회 2012 韓國 中東 學會 論叢 Vol.33 No.1
The phrase of ``La ilaha illa Allah`` in the summarized Sahih Al-Bukhari is mentioned 21 times. This paper will deal the linguistic meanings, the Islamic theological meanings and the expressions in the daily life of Arab and non-Arab muslims. Some Korean records say that Allah in Islam is a spirit filled with falsehood, or a foul spirit from Satan. Korean Christians say that Allah in Islam is quite different from Hananim in Korean and God in English Bible. Meanwhile they translated Hananim in Korean Bible to Allah in Islam in their Arabic Christian Bible. The luckiest person who will have prophet Muhammad`s intercession on the day of resurrection will be the one who said sincerely from his heart La ilaha illa Allah and he will be saved from the Hell. The person who said La ilaha illa Allah does not be killed, his property will be protected, his blood can not be shed, and will enter paradise even if he committed illegal sexual intercourse and theft. Whoever says La ilaha illa Allah, one hundred times a day will get the same reward as given for manumitting ten slaves; and one hundred good deeds will be written in his accounts, and one hundred sins will be deducted from his accounts, and it will be a shield for him from Satan on that day till night, and nobody will be able to do a better deed except the one who does more than he, and whoever recites it ten times will be as if he had manumittted one of Ismail`s descendants. This phrase is spoken and expressed a lot as a means of expressing one`s feelings in the daily life of Arab and non-Arab muslims.